A Carramar resident has taken the battle against dog owners who let their pets poo on people's lawn to the next level - chalking an irate message onto the footpath to warn them off.
Spotted by a WAtoday reader, the chalked message reads 'Dog owners... would you let your dog do this at home? You are on camera!'
A small arrow helpfully points to the well manicured lawn where a fresh coil of dog poo lays as evidence.
Homeowner John Shattock told 6PR's Oliver Peterson he's had enough of people not picking up after their pets.
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"I was so mad when I arrived home and found it, it's just not acceptable and this is not the first time it's happened," Mr Shattock said.
"My wife has headed out just in time to see a family with a toddler in a push chair and some school-age children heading to school and the dog is doing its business on the front lawn."
Mr Shattock's local council is the City of Wanneroo, which has installed around 1000 dog poo bag dispensers at hundreds of parks across its boundaries - so there should be no excuse for letting a pooch pinch one off in the street.
People in Wanneroo who don't pick up after their dogs face fines of up to $100, and councils across Perth have similar penalties in place.
The Carramar resident isn't the only person fed up with the problem: Last year it came to light a Perth man is documenting each and every dog poo he picks up at South Beach Dog Beach.
Andrew MacFarlane posts pictures of evidence collected along the "walk of shame", also known as the "Yellow S--T Road", and other Fremantle locations, on his public Facebook page Dog's Life with the hashtag #NotThatHard.
One particularly sad photo shows that three people discarded poo-bags right underneath the council's warning sign about the offensive nature of such an act. A wheelie bin is metres away.
"It was just an accumulation of times being down the beach and seeing more and more of this stuff lying around and thinking it just has to stop," he told WAtoday.
According to the WA Department of Environment and Conservation, harmful bacteria and nutrients from dog waste can pollute the ocean.
Diseases in the excrement of infected dogs can be passed onto humans, particularly children with compromised immune systems.
And owners who don't do the right thing could be fouling their own nest.
"Research has found that community concern about pet issues such as dog poo in public places is associated with a poor opinion of pet owners, a negative opinion of council animal management services, less support for dog off-leash exercise areas and increased support for legislative controls on pet ownership," the Department's Keep Australia Beautiful fact sheet says.